pages (lists/view): add `list_type` to `template_data`: when a service/node is used for the first time, schema is retrieved, and `list_type` is put in cache and used in template. This allows the template to have specialised views depending on the kind of list user is opening.

import os.path

version_file = os.path.join(os.path.dirname(__file__), "VERSION")
try:
    with open(version_file) as f:
        __version__ = f.read().strip()
except NotImplementedError:
    # pyjamas workaround
    __version__ = "0.7.0D"